Citroen C5 Mk3 Wipers not working

[degut94980]

Hello guys. I need help and advice.
I have problem with my front wipers(they don't work at all).
Citroen c5 x7 reg08.
2.0hdi
First been problem with passinger side it stop working,but driver side still work. But later that solved itself. Then I check with lexia and ot tell me fault : wiper motors mechanicaly jammed.
When wipers stuck second time (same simptomes as in first time) but it not solved itself.
So lexia tell: slave motor operation fault.
I change passinger side wiper motor.
After this still not working and lexia don't jave comunication with wipers ECU.
So did bsi reset. And now wipers still not working and lexia can comunicate with wipers ecu,but don't see any faults.
So may you have any advices?
Thank you

[GiveMeABreak]

There is a master ECU and a slave ECU and they need to talk to each other so the wipers don't collide.

The Master ECU is always in the left hand wiper motor and the slave ECU is the Right hand wiper (regardless of Right or left hand drive vehicles).

Rain water gets in and damages the electronics. This is why it can be hard to troubleshoot the correct wiper, as it may be the opposite motor that is faulty to the wiper that is causing problems.

[Estately]

These wiper motors can be £250 or more each.
Therefore if you are reasonably handy it is worth checking out how to remove them take them apart and clean and grease the moving parts.
The wiper motor case is held together with 3 screws which need careful removal, then use a Stanley blade or similar the cut the sealant, split the case to get inside.
The drive shafts of each motor have a magnet which indicates the shaft position to the circuit board.
My theory is that if the shaft gets hot because of poor lubrication, the magnet slips down the shaft and loses magnetic contact with the circuit board and the wiper parks itself.
You can check this visually and move the magnet back into place, it is described on the forum and youtube.
If the drain hole has become blocked and water has killed the circuit board at least you will know. I do not believe that the motor circuit board can be bought on it's own.
I believe that the master is the driver's side. Our passenger wiper stopped but the driver's kept going perfectly. Passenger and driver's motors are not interchangeable.

Hope that helps.
Andy.

[GiveMeABreak]

Edit:
The master should always be the Driver's side motor.

As left hand drive and right hand drive vehicles have different windscreen motor parts, they are not interchangeable. Technical information is translated by Citroen from French, so when it states the master is the 'Driver's Side' we may have to assume that on RHD vehicles, the master is on on the right side.

[Estately]

Sorry to cause confusion Marc.
My belief was that if the slave motor failed, then only that motor would stop. However if the master failed then both would stop and no wipers at all.

Your post of 1 April 2022 read to me that the right hand ecu was the master ie the uk driver's side and I put 2 and 2 together and made 5. This was because it was our passenger motor that failed, first night in France in a thunderous downpour and we still had a functioning driver's wiper.

Luckily no more rain for a month so windscreen spray and an old vest kept the whole screen sparkling clean.

Andy.

[Bigzed]

Edit:
The master is always in the left Motor Andy
Admin Edit: The master should always be the Driver's side motor.

As left hand drive and right hand drive vehicles have different windscreen motor parts, they are not interchangeable. Technical information is translated by Citroen from French, so when it states the master is the 'Driver's Side' we may have to assume that on RHD vehicles, the master is on on the right side.

As left hand drive and right hand drive vehicles have different windscreen motor parts, they are not interchangeable. Technical information is translated by Citroen from French, so when it states the master is the 'Driver's Side' we may have to assume that on RHD vehicles, the master is on on the right side.

Hi Marc, could you clear this up which is the master and slave motors because in the above quote you say this, but in this thread viewtopic.php?p=483220#p483220 from you it state the master is the drivers side.

I understand that from the valeo parts on my UK vehicle C5 ( X7) 2009

Part 6405LE (Left side / UK Passenger side) - Valeo Part # 53571012
Part 6405LA (Right side / UK Driver side) - Valeo Part # 53570912.

The reason for the clarity is that diagbox diagnostics has reported an issue with the slave motor, and I have replaced the 6405LE motor ( assumed slave from, the other thread (viewtopic.php?p=483220#p483220)), and the wipers are still not working.

Thanks for your help in advance.

[GiveMeABreak]

No problem and thanks for bringing this to my attention. The confusion appears because of LHD and RHD vehicles. The motors are not interchangeable and LHD vehicles have different motor part numbers. We therefore have to assume from the French translation that it is always the 'Driver's' side motor that is the 'Master'. So my original info stands correct, but the one liner response has been edited to reflect this.

I've amended that reply (and your quote of it to avoid further confusion) as 'on the left' won't be applicable to RHD vehicles. Thanks for spotting that.

[Bigzed]

Just spoke to Citroen Dealership.
They have confirmed for UK (RHD) vehicles.

MASTER - Part 6405LA (Right side / UK Driver side)
SLAVE - Part 6405LE (Left side / UK Passenger side)

Both available from stock at the princely sum of £430.32 each.

[GiveMeABreak]

The part numbers above for the RHD only vehicles are fine as we get those from the same live source as Citroen dealers - it was just the issue of the master motor for RHD / LHD, which I think we've sorted now.